Truck is smoking bad all unburned fuel coming out exh. Still runs barely tested injectors all come back fine was told to check injector seals like some input first thanks.

See if this link helps:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-10.html#post1977241

Also, I recommend that you read the other diesel helps in the "Sticky."